diff options
Diffstat (limited to 'drivers/gpu/drm/cirrus/cirrus_mode.c')
| -rw-r--r-- | drivers/gpu/drm/cirrus/cirrus_mode.c | 629 |
1 files changed, 629 insertions, 0 deletions
diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c new file mode 100644 index 000000000000..100f6308c509 --- /dev/null +++ b/drivers/gpu/drm/cirrus/cirrus_mode.c @@ -0,0 +1,629 @@ + +/* + * Copyright 2012 Red Hat + * + * This file is subject to the terms and conditions of the GNU General + * Public License version 2. See the file COPYING in the main + * directory of this archive for more details. + * + * Authors: Matthew Garrett + * Dave Airlie + * + * Portions of this code derived from cirrusfb.c: + * drivers/video/cirrusfb.c - driver for Cirrus Logic chipsets + * + * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com> + */ +#include "drmP.h" +#include "drm.h" +#include "drm_crtc_helper.h" + +#include <video/cirrus.h> + +#include "cirrus_drv.h" + +#define CIRRUS_LUT_SIZE 256 + +#define PALETTE_INDEX 0x8 +#define PALETTE_DATA 0x9 + +/* + * This file contains setup code for the CRTC. + */ + +static void cirrus_crtc_load_lut(struct drm_crtc *crtc) +{ + struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); + struct drm_device *dev = crtc->dev; + struct cirrus_device *cdev = dev->dev_private; + int i; + + if (!crtc->enabled) + return; + + for (i = 0; i < CIRRUS_LUT_SIZE; i++) { + /* VGA registers */ + WREG8(PALETTE_INDEX, i); + WREG8(PALETTE_DATA, cirrus_crtc->lut_r[i]); + WREG8(PALETTE_DATA, cirrus_crtc->lut_g[i]); + WREG8(PALETTE_DATA, cirrus_crtc->lut_b[i]); + } +} + +/* + * The DRM core requires DPMS functions, but they make little sense in our + * case and so are just stubs + */ + +static void cirrus_crtc_dpms(struct drm_crtc *crtc, int mode) +{ + struct drm_device *dev = crtc->dev; + struct cirrus_device *cdev = dev->dev_private; + u8 sr01, gr0e; + + switch (mode) { + case DRM_MODE_DPMS_ON: + sr01 = 0x00; + gr0e = 0x00; + break; + case DRM_MODE_DPMS_STANDBY: + sr01 = 0x20; + gr0e = 0x02; + break; + case DRM_MODE_DPMS_SUSPEND: + sr01 = 0x20; + gr0e = 0x04; + break; + case DRM_MODE_DPMS_OFF: + sr01 = 0x20; + gr0e = 0x06; + break; + default: + return; + } + + WREG8(SEQ_INDEX, 0x1); + sr01 |= RREG8(SEQ_DATA) & ~0x20; + WREG_SEQ(0x1, sr01); + + WREG8(GFX_INDEX, 0xe); + gr0e |= RREG8(GFX_DATA) & ~0x06; + WREG_GFX(0xe, gr0e); +} + +/* + * The core passes the desired mode to the CRTC code to see whether any + * CRTC-specific modifications need to be made to it. We're in a position + * to just pass that straight through, so this does nothing + */ +static bool cirrus_crtc_mode_fixup(struct drm_crtc *crtc, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +void cirrus_set_start_address(struct drm_crtc *crtc, unsigned offset) +{ + struct cirrus_device *cdev = crtc->dev->dev_private; + u32 addr; + u8 tmp; + + addr = offset >> 2; + WREG_CRT(0x0c, (u8)((addr >> 8) & 0xff)); + WREG_CRT(0x0d, (u8)(addr & 0xff)); + + WREG8(CRT_INDEX, 0x1b); + tmp = RREG8(CRT_DATA); + tmp &= 0xf2; + tmp |= (addr >> 16) & 0x01; + tmp |= (addr >> 15) & 0x0c; + WREG_CRT(0x1b, tmp); + WREG8(CRT_INDEX, 0x1d); + tmp = RREG8(CRT_DATA); + tmp &= 0x7f; + tmp |= (addr >> 12) & 0x80; + WREG_CRT(0x1d, tmp); +} + +/* cirrus is different - we will force move buffers out of VRAM */ +static int cirrus_crtc_do_set_base(struct drm_crtc *crtc, + struct drm_framebuffer *fb, + int x, int y, int atomic) +{ + struct cirrus_device *cdev = crtc->dev->dev_private; + struct drm_gem_object *obj; + struct cirrus_framebuffer *cirrus_fb; + struct cirrus_bo *bo; + int ret; + u64 gpu_addr; + + /* push the previous fb to system ram */ + if (!atomic && fb) { + cirrus_fb = to_cirrus_framebuffer(fb); + obj = cirrus_fb->obj; + bo = gem_to_cirrus_bo(obj); + ret = cirrus_bo_reserve(bo, false); + if (ret) + return ret; + cirrus_bo_push_sysram(bo); + cirrus_bo_unreserve(bo); + } + + cirrus_fb = to_cirrus_framebuffer(crtc->fb); + obj = cirrus_fb->obj; + bo = gem_to_cirrus_bo(obj); + + ret = cirrus_bo_reserve(bo, false); + if (ret) + return ret; + + ret = cirrus_bo_pin(bo, TTM_PL_FLAG_VRAM, &gpu_addr); + if (ret) { + cirrus_bo_unreserve(bo); + return ret; + } + + if (&cdev->mode_info.gfbdev->gfb == cirrus_fb) { + /* if pushing console in kmap it */ + ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); + if (ret) + DRM_ERROR("failed to kmap fbcon\n"); + } + cirrus_bo_unreserve(bo); + + cirrus_set_start_address(crtc, (u32)gpu_addr); + return 0; +} + +static int cirrus_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, + struct drm_framebuffer *old_fb) +{ + return cirrus_crtc_do_set_base(crtc, old_fb, x, y, 0); +} + +/* + * The meat of this driver. The core passes us a mode and we have to program + * it. The modesetting here is the bare minimum required to satisfy the qemu + * emulation of this hardware, and running this against a real device is + * likely to result in an inadequately programmed mode. We've already had + * the opportunity to modify the mode, so whatever we receive here should + * be something that can be correctly programmed and displayed + */ +static int cirrus_crtc_mode_set(struct drm_crtc *crtc, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode, + int x, int y, struct drm_framebuffer *old_fb) +{ + struct drm_device *dev = crtc->dev; + struct cirrus_device *cdev = dev->dev_private; + int hsyncstart, hsyncend, htotal, hdispend; + int vtotal, vdispend; + int tmp; + int sr07 = 0, hdr = 0; + + htotal = mode->htotal / 8; + hsyncend = mode->hsync_end / 8; + hsyncstart = mode->hsync_start / 8; + hdispend = mode->hdisplay / 8; + + vtotal = mode->vtotal; + vdispend = mode->vdisplay; + + vdispend -= 1; + vtotal -= 2; + + htotal -= 5; + hdispend -= 1; + hsyncstart += 1; + hsyncend += 1; + + WREG_CRT(VGA_CRTC_V_SYNC_END, 0x20); + WREG_CRT(VGA_CRTC_H_TOTAL, htotal); + WREG_CRT(VGA_CRTC_H_DISP, hdispend); + WREG_CRT(VGA_CRTC_H_SYNC_START, hsyncstart); + WREG_CRT(VGA_CRTC_H_SYNC_END, hsyncend); + WREG_CRT(VGA_CRTC_V_TOTAL, vtotal & 0xff); + WREG_CRT(VGA_CRTC_V_DISP_END, vdispend & 0xff); + + tmp = 0x40; + if ((vdispend + 1) & 512) + tmp |= 0x20; + WREG_CRT(VGA_CRTC_MAX_SCAN, tmp); + + /* + * Overflow bits for values that don't fit in the standard registers + */ + tmp = 16; + if (vtotal & 256) + tmp |= 1; + if (vdispend & 256) + tmp |= 2; + if ((vdispend + 1) & 256) + tmp |= 8; + if (vtotal & 512) + tmp |= 32; + if (vdispend & 512) + tmp |= 64; + WREG_CRT(VGA_CRTC_OVERFLOW, tmp); + + tmp = 0; + + /* More overflow bits */ + + if ((htotal + 5) & 64) + tmp |= 16; + if ((htotal + 5) & 128) + tmp |= 32; + if (vtotal & 256) + tmp |= 64; + if (vtotal & 512) + tmp |= 128; + + WREG_CRT(CL_CRT1A, tmp); + + /* Disable Hercules/CGA compatibility */ + WREG_CRT(VGA_CRTC_MODE, 0x03); + + WREG8(SEQ_INDEX, 0x7); + sr07 = RREG8(SEQ_DATA); + sr07 &= 0xe0; + hdr = 0; + switch (crtc->fb->bits_per_pixel) { + case 8: + sr07 |= 0x11; + break; + case 16: + sr07 |= 0xc1; + hdr = 0xc0; + break; + case 24: + sr07 |= 0x15; + hdr = 0xc5; + break; + case 32: + sr07 |= 0x19; + hdr = 0xc5; + break; + default: + return -1; + } + + WREG_SEQ(0x7, sr07); + + /* Program the pitch */ + tmp = crtc->fb->pitches[0] / 8; + WREG_CRT(VGA_CRTC_OFFSET, tmp); + + /* Enable extended blanking and pitch bits, and enable full memory */ + tmp = 0x22; + tmp |= (crtc->fb->pitches[0] >> 7) & 0x10; + tmp |= (crtc->fb->pitches[0] >> 6) & 0x40; + WREG_CRT(0x1b, tmp); + + /* Enable high-colour modes */ + WREG_GFX(VGA_GFX_MODE, 0x40); + + /* And set graphics mode */ + WREG_GFX(VGA_GFX_MISC, 0x01); + + WREG_HDR(hdr); + cirrus_crtc_do_set_base(crtc, old_fb, x, y, 0); + return 0; +} + +/* + * This is called before a mode is programmed. A typical use might be to + * enable DPMS during the programming to avoid seeing intermediate stages, + * but that's not relevant to us + */ +static void cirrus_crtc_prepare(struct drm_crtc *crtc) +{ +} + +/* + * This is called after a mode is programmed. It should reverse anything done + * by the prepare function + */ +static void cirrus_crtc_commit(struct drm_crtc *crtc) +{ +} + +/* + * The core can pass us a set of gamma values to program. We actually only + * use this for 8-bit mode so can't perform smooth fades on deeper modes, + * but it's a requirement that we provide the function + */ +static void cirrus_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, uint32_t start, uint32_t size) +{ + struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); + int i; + + if (size != CIRRUS_LUT_SIZE) + return; + + for (i = 0; i < CIRRUS_LUT_SIZE; i++) { + cirrus_crtc->lut_r[i] = red[i]; + cirrus_crtc->lut_g[i] = green[i]; + cirrus_crtc->lut_b[i] = blue[i]; + } + cirrus_crtc_load_lut(crtc); +} + +/* Simple cleanup function */ +static void cirrus_crtc_destroy(struct drm_crtc *crtc) +{ + struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); + + drm_crtc_cleanup(crtc); + kfree(cirrus_crtc); +} + +/* These provide the minimum set of functions required to handle a CRTC */ +static const struct drm_crtc_funcs cirrus_crtc_funcs = { + .gamma_set = cirrus_crtc_gamma_set, + .set_config = drm_crtc_helper_set_config, + .destroy = cirrus_crtc_destroy, +}; + +static const struct drm_crtc_helper_funcs cirrus_helper_funcs = { + .dpms = cirrus_crtc_dpms, + .mode_fixup = cirrus_crtc_mode_fixup, + .mode_set = cirrus_crtc_mode_set, + .mode_set_base = cirrus_crtc_mode_set_base, + .prepare = cirrus_crtc_prepare, + .commit = cirrus_crtc_commit, + .load_lut = cirrus_crtc_load_lut, +}; + +/* CRTC setup */ +static void cirrus_crtc_init(struct drm_device *dev) +{ + struct cirrus_device *cdev = dev->dev_private; + struct cirrus_crtc *cirrus_crtc; + int i; + + cirrus_crtc = kzalloc(sizeof(struct cirrus_crtc) + + (CIRRUSFB_CONN_LIMIT * sizeof(struct drm_connector *)), + GFP_KERNEL); + + if (cirrus_crtc == NULL) + return; + + drm_crtc_init(dev, &cirrus_crtc->base, &cirrus_crtc_funcs); + + drm_mode_crtc_set_gamma_size(&cirrus_crtc->base, CIRRUS_LUT_SIZE); + cdev->mode_info.crtc = cirrus_crtc; + + for (i = 0; i < CIRRUS_LUT_SIZE; i++) { + cirrus_crtc->lut_r[i] = i; + cirrus_crtc->lut_g[i] = i; + cirrus_crtc->lut_b[i] = i; + } + + drm_crtc_helper_add(&cirrus_crtc->base, &cirrus_helper_funcs); +} + +/** Sets the color ramps on behalf of fbcon */ +void cirrus_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green, + u16 blue, int regno) +{ + struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); + + cirrus_crtc->lut_r[regno] = red; + cirrus_crtc->lut_g[regno] = green; + cirrus_crtc->lut_b[regno] = blue; +} + +/** Gets the color ramps on behalf of fbcon */ +void cirrus_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, int regno) +{ + struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); + + *red = cirrus_crtc->lut_r[regno]; + *green = cirrus_crtc->lut_g[regno]; + *blue = cirrus_crtc->lut_b[regno]; +} + + +static bool cirrus_encoder_mode_fixup(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void cirrus_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ +} + +static void cirrus_encoder_dpms(struct drm_encoder *encoder, int state) +{ + return; +} + +static void cirrus_encoder_prepare(struct drm_encoder *encoder) +{ +} + +static void cirrus_encoder_commit(struct drm_encoder *encoder) +{ +} + +void cirrus_encoder_destroy(struct drm_encoder *encoder) +{ + struct cirrus_encoder *cirrus_encoder = to_cirrus_encoder(encoder); + drm_encoder_cleanup(encoder); + kfree(cirrus_encoder); +} + +static const struct drm_encoder_helper_funcs cirrus_encoder_helper_funcs = { + .dpms = cirrus_encoder_dpms, + .mode_fixup = cirrus_encoder_mode_fixup, + .mode_set = cirrus_encoder_mode_set, + .prepare = cirrus_encoder_prepare, + .commit = cirrus_encoder_commit, +}; + +static const struct drm_encoder_funcs cirrus_encoder_encoder_funcs = { + .destroy = cirrus_encoder_destroy, +}; + +static struct drm_encoder *cirrus_encoder_init(struct drm_device *dev) +{ + struct drm_encoder *encoder; + struct cirrus_encoder *cirrus_encoder; + + cirrus_encoder = kzalloc(sizeof(struct cirrus_encoder), GFP_KERNEL); + if (!cirrus_encoder) + return NULL; + + encoder = &cirrus_encoder->base; + encoder->possible_crtcs = 0x1; + + drm_encoder_init(dev, encoder, &cirrus_encoder_encoder_funcs, + DRM_MODE_ENCODER_DAC); + drm_encoder_helper_add(encoder, &cirrus_encoder_helper_funcs); + + return encoder; +} + + +int cirrus_vga_get_modes(struct drm_connector *connector) +{ + /* Just add a static list of modes */ + drm_add_modes_noedid(connector, 640, 480); + drm_add_modes_noedid(connector, 800, 600); + drm_add_modes_noedid(connector, 1024, 768); + drm_add_modes_noedid(connector, 1280, 1024); + + return 4; +} + +static int cirrus_vga_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + /* Any mode we've added is valid */ + return MODE_OK; +} + +struct drm_encoder *cirrus_connector_best_encoder(struct drm_connector + *connector) +{ + int enc_id = connector->encoder_ids[0]; + struct drm_mode_object *obj; + struct drm_encoder *encoder; + + /* pick the encoder ids */ + if (enc_id) { + obj = + drm_mode_object_find(connector->dev, enc_id, + DRM_MODE_OBJECT_ENCODER); + if (!obj) + return NULL; + encoder = obj_to_encoder(obj); + return encoder; + } + return NULL; +} + +static enum drm_connector_status cirrus_vga_detect(struct drm_connector + *connector, bool force) +{ + return connector_status_connected; +} + +static void cirrus_connector_destroy(struct drm_connector *connector) +{ + drm_connector_cleanup(connector); + kfree(connector); +} + +struct drm_connector_helper_funcs cirrus_vga_connector_helper_funcs = { + .get_modes = cirrus_vga_get_modes, + .mode_valid = cirrus_vga_mode_valid, + .best_encoder = cirrus_connector_best_encoder, +}; + +struct drm_connector_funcs cirrus_vga_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .detect = cirrus_vga_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = cirrus_connector_destroy, +}; + +static struct drm_connector *cirrus_vga_init(struct drm_device *dev) +{ + struct drm_connector *connector; + struct cirrus_connector *cirrus_connector; + + cirrus_connector = kzalloc(sizeof(struct cirrus_connector), GFP_KERNEL); + if (!cirrus_connector) + return NULL; + + connector = &cirrus_connector->base; + + drm_connector_init(dev, connector, + &cirrus_vga_connector_funcs, DRM_MODE_CONNECTOR_VGA); + + drm_connector_helper_add(connector, &cirrus_vga_connector_helper_funcs); + + return connector; +} + + +int cirrus_modeset_init(struct cirrus_device *cdev) +{ + struct drm_encoder *encoder; + struct drm_connector *connector; + int ret; + + drm_mode_config_init(cdev->dev); + cdev->mode_info.mode_config_initialized = true; + + cdev->dev->mode_config.max_width = CIRRUS_MAX_FB_WIDTH; + cdev->dev->mode_config.max_height = CIRRUS_MAX_FB_HEIGHT; + + cdev->dev->mode_config.fb_base = cdev->mc.vram_base; + cdev->dev->mode_config.preferred_depth = 24; + /* don't prefer a shadow on virt GPU */ + cdev->dev->mode_config.prefer_shadow = 0; + + cirrus_crtc_init(cdev->dev); + + encoder = cirrus_encoder_init(cdev->dev); + if (!encoder) { + DRM_ERROR("cirrus_encoder_init failed\n"); + return -1; + } + + connector = cirrus_vga_init(cdev->dev); + if (!connector) { + DRM_ERROR("cirrus_vga_init failed\n"); + return -1; + } + + drm_mode_connector_attach_encoder(connector, encoder); + + ret = cirrus_fbdev_init(cdev); + if (ret) { + DRM_ERROR("cirrus_fbdev_init failed\n"); + return ret; + } + + return 0; +} + +void cirrus_modeset_fini(struct cirrus_device *cdev) +{ + cirrus_fbdev_fini(cdev); + + if (cdev->mode_info.mode_config_initialized) { + drm_mode_config_cleanup(cdev->dev); + cdev->mode_info.mode_config_initialized = false; + } +} |